package m202405.d12;

/**
 * @@author: 爱做梦的锤子
 * @date: 2024/5/12 15:17
 */
public class Q141 {
    public boolean hasCycle(ListNode head) {
        ListNode slow = head;
        ListNode fast = head;
        while (slow != null && fast != null && fast.next != null) {
            slow = slow.next;
            fast = fast.next.next;
            if (slow == fast) {
                return true;
            }
        }
        return false;
    }
}
